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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script>
      /*
      编写程序，由键盘输入3个整数分别存入变量num1,num2,num3,
      对他们进行排序，并且从小到大输出
      */

      // prompt()函数返回值是String类型的
      var num1 = +prompt("请输入第一个数");
      var num2 = +prompt("请输入第二个数");
      var num3 = +prompt("请输入第三个数");
      if (num1 < num2 && num1 < num3) {
        if (num2 < num3) alert(num1 + "," + num2 + "," + num3);
      } else if (num2 < num1 && num2 < num3) {
        if (num1 < num3) {
          alert(num2 + "," + num1 + "," + num3);
        } else {
          alert(num2 + "," + num3 + "," + num1);
        }
      } else {
        if (num1 < num2) {
          alert(num3 + "," + num1 + "," + num2);
        } else {
          alert(num3 + "," + num2 + "," + num1);
        }
      }
    </script>
  </head>
  <body></body>
</html>
